/Engine/Plugins/Experimental/PCG/Source/PCG/Public/Elements/Metadata/PCGMetadataOpElementBase.h
Can override to add a custom icon next to the pin label (and an optional tooltip). Return false if no override is available.
virtual bool GetPinExtraIcon ( const [UPCGPin](API\Plugins\PCG\UPCGPin) * InPin, [FName](API\Runtime\Core\UObject\FName) & OutExtraIcon, [FText](API\Runtime\Core\Internationalization\FText) & OutTooltip ) const